Understanding the basic principles of dilution refrigeration is essential for operating a ZPC dilution refrigerator effectively. While there are comprehensive guides available on the subject, we provide a condensed overview for quick reference. The first principle involves the cooling of helium isotopes. Helium-4 (4He), the common isotope, liquefies at 4.2 K under standard pressure. Further cooling can be achieved by pumping on it, extracting its latent heat of vaporization. However, the cooling power is limited by the exponentially decreasing vapor pressure of helium. This restricts the achievable temperature to around 0.8 K, realistically reaching 1.2 K in the laboratory.